Key Verses

1. 2:249Al-Baqarah
   فَلَمَّا فَصَلَ طَالُوتُ بِٱلۡجُنُودِ قَالَ إِنَّ ٱللَّهَ مُبۡتَلِيكُم بِنَهَرٖ فَمَن شَرِبَ مِنۡهُ فَلَيۡسَ مِنِّي وَمَن لَّمۡ يَطۡعَمۡهُ فَإِنَّهُۥ مِنِّيٓ إِلَّا مَنِ ٱغۡتَرَفَ غُرۡفَةَۢ بِيَدِهِۦۚ فَشَرِبُواْ مِنۡهُ إِلَّا قَلِيلٗا مِّنۡهُمۡۚ فَلَمَّا جَاوَزَهُۥ هُوَ وَٱلَّذِينَ ءَامَنُواْ مَعَهُۥ قَالُواْ لَا طَاقَةَ لَنَا ٱلۡيَوۡمَ بِجَالُوتَ وَجُنُودِهِۦۚ قَالَ ٱلَّذِينَ يَظُنُّونَ أَنَّهُم مُّلَٰقُواْ ٱللَّهِ كَم مِّن فِئَةٖ قَلِيلَةٍ غَلَبَتۡ فِئَةٗ كَثِيرَةَۢ بِإِذۡنِ ٱللَّهِۗ وَٱللَّهُ مَعَ ٱلصَّـٰبِرِينَ
   And when Saul set out with the army, he said: Lo! Allah will try you by (the ordeal of) a river. Whosoever therefore drinketh thereof he is not of me, and whosoever tasteth it not he is of me, save him who taketh (thereof) in the hollow of his hand. But they drank thereof, all save a few of them. And after he had crossed (the river), he and those who believed with him, they said: We have no power this day against Goliath and his hosts. But those who knew that they would meet Allah exclaimed: How many a little company hath overcome a mighty host by Allah's leave! Allah is with the steadfast.
   In context

   When Saul set out with his warriors, he said to them, ‘Allah will test you with a river. If anyone drinks from it, he will not be on my path and must not join me in fighting. The person who does not drink from it will be on my path and will join me in the fight. If someone drinks a handful of water, this will be forgiven’.

2. 2:250Al-Baqarah
   وَلَمَّا بَرَزُواْ لِجَالُوتَ وَجُنُودِهِۦ قَالُواْ رَبَّنَآ أَفۡرِغۡ عَلَيۡنَا صَبۡرٗا وَثَبِّتۡ أَقۡدَامَنَا وَٱنصُرۡنَا عَلَى ٱلۡقَوۡمِ ٱلۡكَٰفِرِينَ
   And when they went into the field against Goliath and his hosts they said: Our Lord! Bestow on us endurance, make our foothold sure, and give us help against the disbelieving folk.
   In context

   When they came out to face Goliath and his army, they prayed to Allah, saying: Our Lord, grant us patience in our hearts, make our feet firm so that we do not flee or lose courage before our enemies, and give us Your assistance and support against the disbelieving people.

3. 2:251Al-Baqarah
   فَهَزَمُوهُم بِإِذۡنِ ٱللَّهِ وَقَتَلَ دَاوُۥدُ جَالُوتَ وَءَاتَىٰهُ ٱللَّهُ ٱلۡمُلۡكَ وَٱلۡحِكۡمَةَ وَعَلَّمَهُۥ مِمَّا يَشَآءُۗ وَلَوۡلَا دَفۡعُ ٱللَّهِ ٱلنَّاسَ بَعۡضَهُم بِبَعۡضٖ لَّفَسَدَتِ ٱلۡأَرۡضُ وَلَٰكِنَّ ٱللَّهَ ذُو فَضۡلٍ عَلَى ٱلۡعَٰلَمِينَ
   So they routed them by Allah's leave and David slew Goliath; and Allah gave him the kingdom and wisdom, and taught him of that which He willeth. And if Allah had not repelled some men by others the earth would have been corrupted. But Allah is a Lord of Kindness to (His) creatures.
   In context

   They defeated them by God’s will. The prophet of God, David, killed their leader Goliath and God gave him kingship and prophethood and taught him many sciences as He willed, including those that are beneficial for this world and those for the hearafter.